Action Completeness Modeling. The methods of CMCS [1]}, Hide-and-Seek [2]}, and Step-by-step [3]} target the action completeness and CMCS [1]} achieves a superior performance. This is because Hide-and-Seek [2]} and Step-by-step [3]} do not guarantee the discovery of new parts by randomly hiding or removing different video regions. In contrary, CMCS [1]} employs a diversity loss to enforce the model to discover complementary action parts.
